Artificial-stone composition.



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EXAM

UNITED "STATES PATENT OFFICE.

EVERED W. ANDERSON, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TOCHARLES W. WEBB, OF BALTIMORE, MARYLAND.

. ARTIFICIAL-STONE COMPOSITION.

To all whom it may concern:

Be it known that I, EVERED W. ANDER- SON, a citizen of the UnitedStates, residing at Baltimore, in the State of Maryland, have 5 inventedcertain new and useful Improvements in Artificial-Stone Compositions, ofwhich the following is a specification.

My invention comprises a composition of matter for the manufacture ofartificial 0 stone.

In carrying out my invention I crush a suitable quantity of granite,marble or other stone to a fine condition so that its particles will be,in size, about like that of granulated I mix this in a dry state, withan equal iquantity of cement and small percent ages 0' pulverizedsoapstone and lime putty, that is slakedlime which, in solution, hasbeen passed through a cloth so, as to remove 0 the gritty parts. Smallportions of bicarbonate of soda and alum, are dissolved in water andthis solution is then mixed with the before mentioned ingredients, thequantity of water used being sufficient to make 5 the mass of theconsistency of soft putty. This plastic material is then placed insuitable molds and allowed to harden. The proportions of ingredientswhich I prefer to use are, by measurement, granulated stone 0forty-three parts, cement or yree ar s ve arts, bicarbona .e o

Specification of Letters Patent. Application filed January 80, 1908.serial No. 413,491.

vIe parts, sakec iree parts and a um one pafi. lfter, tliis mass, mixedin the manner before de- 5 scribed, has been in the mold for aboutfortyeight hours, and before it has fully set or] hardened, it will takea good olish and the polishing operation is prefera ly gerform d at thisstage because it requires ess l or 0 than after the stone has becomeharder. It may, however, be polished after it has fully Patented July 6,1909.

hardened. The proportions of ingredients may be varied somewhat but forthe best results I prefer the proportions stated. In some cases I mayomit the soapstone and lime, although the addition of these ingredientsgives a more desirable result.

The cement and anulated stone form the basis of the composition the limerenders the mixture more pliable for the purpose of molding than itotherwise would be the bicarbonate of soda in conjunction with the alumgreatly increases the density and hardness of the finished stone, andthe soapstone is used for the purpose of giving luster to the finishedstone.

What I claim is,-

1. Anartificial stone composition comprising gramiTated s'tonefcement,pulverized soapstone,limef"bicarbonate""of soda and alum?" a 1:2". An artificial stone composition comprising granulated stone fort-three parts, cement forty-three parts, .pu verized soapstone fiveparts, lime five parts, bicarbonate of soda three arts and alum onepart.

3 in artificial stone composition comprisin granulated stone and cementin ap roxim tely equal proportions, with sma per- 0 ntages of lime,soapstone, bicarbonate of oda and alum.

4. An artificial stone composition comprising a mixture of cement andfinely crushed stone, with small percentages of bicarbonate of soda andalum.

In testimony whereof I aflix my signature, in presence of two witnesses.

EVERED W. ANDERSON.

Witnesses:

LOUISE FRINK, JNO. WATSON, Jr.

